A.) zygote > Implantation > fetus > childbirth
Ok so choose 2 ecosystems which is not that hard aquatic and terrestrial research your information on the sight i can not do the work for you, don't forget to check your spelling and punctuation
Answer: The iris
Like the diaphragm of a camera, the iris can “change its size” depending on how much light there is. Both the iris and the diaphragm of a camera can increase or dilate to let in or reduce the amount of light that enters.